Between brackets is the number of accepted species
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2 Shows the number of accepted species within the taxon
3 The last expanded taxon is highlighted
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- Biota
- Kingdom Animalia
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Phylum Acritarcha †
- Phylum Algae (awaiting allocation)
- Phylum Algae incertae sedis
- Phylum Anthocerotophyta
- Phylum Bryophyta
- Phylum Calcitarcha †
- Phylum Charophyta
- Phylum Chlorophyta
- Subdivision Chlorophytina
- Class Bryopsidophyceae accepted as Ulvophyceae
- Class Chlorodendrophyceae
- Class Chlorophyceae
- Class Pedinophyceae
- Class Pleurastrophyceae accepted as Chlorophyceae
- Class Trebouxiophyceae
- Class Ulvophyceae
- Order Acrosiphoniales accepted as Ulotrichales
- Order Bryopsidales
- Family Bryopsidaceae Bory de Saint-Vincent, 1829
- Family Bryopsidales (awaiting allocation)
- Family Caulerpaceae Kützing, 1843
- Family Chaetosiphonaceae Blackman & Tansley, 1902
- Family Codiaceae Kützing, 1843
- Family Derbesiaceae Hauck, 1884
- Family Dichotomosiphonaceae
- Family Halimedaceae Link, 1832
- Family Lanciculaceae Shuysky, 1987 †
- Family Ostreobiaceae P.C. Silva, 2007
- Family Protohalimedaceae Dragastan, Littler & Littler, 2002 †
- Family Pseudocodiaceae L. Hillis-Colinvaux
- Family Pseudoudoteaceae Dragastan et al., 1997 †
- Family Rhipiliaceae
- Family Udoteaceae J.G. Agardh, 1887
- Genus Ancestria M.S. Farghaly, 1980 accepted as Penicillus Lamarck, 1813
- Genus Aurainvillea accepted as Avrainvillea Decaisne, 1842
- Genus Boodleopsis A. Gepp & E.S. Gepp, 1911
- Genus Botryodesmis Kraft, 2007
- Genus Chlorodesmis Harvey & Bailey, 1841
- Genus Chlorodesmus accepted as Chlorodesmis Harvey & Bailey, 1841
- Genus Chloroplegma G. Zanardini, 1858
- Genus Clibeca J. Poncet, 1975 †
- Genus Clodocephalus accepted as Cladocephalus M.A. Howe, 1905
- Genus Coralliodendron F.T. Kützing, 1841
- Genus Corallocephalus F.T. Kützing, 1843
- Genus Decaisnella Farghaly, 1980 accepted as Udotea J.V.F. Lamouroux, 1812
- Genus Espera Decaisne, 1842
- Genus Flabellia Reichenbach, 1841 accepted as Codium Stackhouse, 1797
- Genus Fradelia J.F. Chauvin, 1842
- Genus Gaspesiella B. Mamet & A. Roux in Bourque et al., 1981 †
- Genus Geppina Farghaly, 1980
- Genus Halimedea Lamouroux, 1812
- Genus Johnson-sea-linkia N.J. Eiseman & S.A. Earle, 1983 accepted as Rhipiliopsis A. Gepp & E.S. Gepp, 1911
- Genus Nesaea J.V.F. Lamouroux, 1812 accepted as Penicillus Lamarck, 1813
- Genus Olafsenia V.B.A. Trevisan, 1849
- Genus Opuntia F. Naccari, 1828
- Genus Penicillus Lamarck, 1813
- Genus Photophobe (S.L. Endlicher) J.F.C. Montagne in A.C.V.D. d'Orbigny, 1847
- Genus Poropsis Kützing, 1856
- Genus Pseudochlorodesmis Børgesen, 1925
- Genus Pseudopenicillus O. Dragastan, D.K. Richter, B. Kube, M. Popa, A. Sarbu & I. Ciugulea, 1997 †
- Genus Rhipidosiphon Montagne, 1842
- Genus Rhipiliella Kraft, 1986
- Genus Rhipilopsis accepted as Rhipiliopsis A. Gepp & E.S. Gepp, 1911
- Genus Rhipocephalus Kützing, 1843
- Species Rhipocephalus oblongus (Decaisne) Kützing, 1849
- Species Rhipocephalus phoenix (J. Ellis & Solander) Kützing, 1843
- Genus Rhipozonium F.T. Kützing, 1841
- Genus Siphonoclathrus S.A. Earle & J.R. Young, 1972
- Genus Siphonogramen I.A. Abbott & J.A. Huisman, 2004
- Genus Tuxekanella Riding & Soja, 1993 †
- Genus Tydemania Weber-van Bosse, 1901
- Genus Udotea J.V.F. Lamouroux, 1812
- Genus Vintonella B. Mamet & A. Preat, 2013 †
- Genus Inocladus S.T. LoDuca et al., 2020 †
- Order Chlorocystidales accepted as Ulotrichales
- Order Cladophorales
- Order Ctenocladales accepted as Ulvales
- Order Cyclocrinales †
- Order Dasycladales
- Order Ignatiales
- Order Oltmannsiellopsidales
- Order Phaeophilales accepted as Ulvales
- Order Scotinosphaerales
- Order Siphonales accepted as Bryopsidales
- Order Siphonocladales accepted as Cladophorales
- Order Trentepohliales
- Order Ulotrichales
- Order Ulvales
- Order Ulvophyceae (awaiting allocation)
- Genus Symbiochlorum S. Gong & Z. Li in Gong et al., 2018
- Subdivision Prasinophytina
- Class Chlorophyta (awaiting allocation)
- Class Chloropicophyceae
- Class Picocystophyceae
- Class Prasinophyceae accepted as Prasinophytina
- Genus Archaeochaeta K.M. Maloney, D.P. Maverick, J.D. Schiffbauer, G.P. Halverson, S. Xiao & M. Laflamme, 2023 †
- Genus Archaeophycus F. Wang, X. Zhang & R. Guo, 1983 †
- Genus Characrhynium Krings, 2024 †
- Genus Chordecystia C.B. Foster, 1979 † accepted as Reduviasporonites L.R. Wilson, 1962 †
- Genus Dictyosphaera Y. Xing & K. Liu, 1973 †
- Genus Harpericystis Krings, 2024 †
- Genus Jiuqunaoella M. Chen & Z.Z. Xiao, 1991 †
- Genus Menieria Y. Wang, J. Jin & R. Zhan, 2014 †
- Genus Palambages O. Wetzel, 1961 †
- Genus Paratetraphycus Z. Zhang, 1985 † accepted as Archaeophycus F. Wang, X. Zhang & R. Guo, 1983 †
- Genus Reduviasporonites L.R. Wilson, 1962 †
- Genus Sarcinophycus S. Xiao & A.H. Knoll, 1999 †
- Genus Shuiyousphaeridium Yan in Yan & Zhu, 1992 †
- Genus Sigmopollis R.W. Hedlund, 1965 †
- Genus Sphaerosiphon Schussnig, 1915
- Genus Tetraphycoides F. Cao, 1985 † accepted as Archaeophycus F. Wang, X. Zhang & R. Guo, 1983 †
- Genus Tympanicysta B.E. Balme, 1980 † accepted as Reduviasporonites L.R. Wilson, 1962 †
- Genus Yunnanospirellus Li, Wei, Guo & Cong, 2024 †
- Phylum Eophyta †
- Phylum Glaucophyta
- Phylum Gymnospermophyta accepted as Tracheophyta
- Phylum Horneophyta †
- Phylum Magnoliophyta accepted as Tracheophyta
- Phylum Marchantiophyta
- Phylum Picozoa
- Phylum Plantae (awaiting allocation)
- Phylum Prasinodermatophyta
- Phylum Pteridophyta accepted as Tracheophyta
- Phylum Rhodelphidia
- Phylum Rhodophyta
- Phylum Sporae dispersae †
- Phylum Tracheophyta
- Phylum Vendophyta † accepted as Algae incertae sedis
- Class Nematophyceae † accepted as Nematophyta †
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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